Coalescence: Drainage and Stability of Thin Films

聚结：薄膜的排水和稳定性

• 批准号: 8511207
• 负责人: John Slattery
• 金额: $ 6万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1985
• 资助国家: 美国
• 起止时间: 1985-09-01 至 1987-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8511207&HistoricalAwards=false
• 关键词: Coalescence; Drainage; Stability; Thin; Films

This research project is concerned with the drainage and stability of thin films which could be associated with unstable foams. The role of surface viscosity in coalescence at liquid-gas interfaces is investigated using single bubbles. The premise of previous work is that the same factors influence both the coalescence of single bubbles or drops at phase interfaces and the displacement of an unstable foam in a porous medium. This research project focuses on studying, both theoretically and experimentally, the problem of the coalescence of single bubbles or drops. A more detailed theory that will include the effects of any electrostatic double-layer forces is currently being developed. Using these theories as a basis, a systematic experimental study of the effects of the surface viscosities upon the coalescence times of single bubbles at liquid-gas interfaces is initiated. This includes complementary measurements of the two surface viscosities.

该研究项目涉及薄膜的排水和稳定性，这些薄膜可能与不稳定的泡沫有关。 使用单个气泡研究了表面粘度在液态气体界面上合并的作用。 先前工作的前提是，相同的因素会影响单个气泡或相位界面处的滴剂的聚结，以及在多孔培养基中的不稳定泡沫的位移。 该研究项目的重点是在理论上和实验上研究单个气泡或滴剂的合并问题。 目前正在开发一种更详细的理论，该理论将包括任何静电双层力的影响。 以这些理论为基础，启动了对表面粘度对液体气体界面上单个气泡合并时间的影响的系统实验研究。 这包括两个表面粘度的互补测量。